What happens at the melting point temperature of a substance? A) temperature change
B) phase change solid -> liquid
C) phase change liquid -> gas
D) Nothing occurs

C

Explanation:

Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.